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Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL

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Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 1 Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 2 Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 3 Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 4 Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 5 Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 6 Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 7 Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL photo 8

Description

Vintage Factory Transmission Components — Lifestyle Powersports Inventory Vault
Up for sale is a genuine, Harley-Davidson Factory OEM 4-Speed Kickstart-Only Transmission Mainshaft and Gear Assembly. Safely preserved in clean, oiled storage condition, this original set was sourced from a classic Big Twin platform. It features the authentic factory-forged heat treatment finish and heavy-duty slider dog profiles that antique builders look for to keep their period-correct drivetrain running with reliable strength.
Product Specifications & Engineering Parameters:
  • Brand: Harley-Davidson (Original Equipment Manufacturer - OEM)
  • Transmission Type: 4-Speed Constant Mesh
  • Factory Mainshaft Length Reference: 11-3/4 inches (11.75" / 298mm short tapered style)
  • OEM Part Number Cross-References:
    • Mainshaft: #35040-50
    • Main Drive 4th Gear: #35065-65B (26-Tooth)
  • Platform Fitment Bounds: Direct drop-on replacement for original 4-speed gearboxes on late 1937 through 1964 Harley Big Twin models:
    • 1936–1947 Knucklehead (EL / FL)
    • 1948–1964 Panhead (FL / FLH)
    • 1937–1948 Big Flathead (UL / ULH)
  • Exclusions: Kickstart-only length. Does NOT fit 1965–1969 generator Shovelheads (which use the longer 12" mainshaft #35039-65) or 1970–1984 alternator Shovelheads (which use the 12-1/2" mainshaft #35039-70A).
  • Included Components:
    • One (1) OEM Short Tapered Mainshaft (#35040-50)
    • One (1) OEM Main Drive Gear (4th Gear) with internal bushing
    • One (1) OEM Mainshaft Low Gear (1st Gear)
    • One (1) OEM Mainshaft 3rd Gear
    • One (1) Aftermarket mainshaft sprocket seal locking nut upgrade with a rubber oil seal interface.
  • Condition Details: Clean used vintage stock. Gear teeth faces show sharp, functional profiles with excellent factory dog corners and no chips. Splined regions are solid with uniform tracking paths. The assembly is coated in clean storage oil to preserve it against rust or warehouse humidity.

Harley 4 Speed Transmission Mainshaft Gears Panhead Knucklehead OEM 1937-1964 FL

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Vintage Factory Transmission Components — Lifestyle Powersports Inventory Vault Up for sale is a genuine, Harley-Davidson Factory OEM 4-Speed Kickstart-Only... Read more

1 in stock

$100.00

      Description

      Vintage Factory Transmission Components — Lifestyle Powersports Inventory Vault
      Up for sale is a genuine, Harley-Davidson Factory OEM 4-Speed Kickstart-Only Transmission Mainshaft and Gear Assembly. Safely preserved in clean, oiled storage condition, this original set was sourced from a classic Big Twin platform. It features the authentic factory-forged heat treatment finish and heavy-duty slider dog profiles that antique builders look for to keep their period-correct drivetrain running with reliable strength.
      Product Specifications & Engineering Parameters:
      • Brand: Harley-Davidson (Original Equipment Manufacturer - OEM)
      • Transmission Type: 4-Speed Constant Mesh
      • Factory Mainshaft Length Reference: 11-3/4 inches (11.75" / 298mm short tapered style)
      • OEM Part Number Cross-References:
        • Mainshaft: #35040-50
        • Main Drive 4th Gear: #35065-65B (26-Tooth)
      • Platform Fitment Bounds: Direct drop-on replacement for original 4-speed gearboxes on late 1937 through 1964 Harley Big Twin models:
        • 1936–1947 Knucklehead (EL / FL)
        • 1948–1964 Panhead (FL / FLH)
        • 1937–1948 Big Flathead (UL / ULH)
      • Exclusions: Kickstart-only length. Does NOT fit 1965–1969 generator Shovelheads (which use the longer 12" mainshaft #35039-65) or 1970–1984 alternator Shovelheads (which use the 12-1/2" mainshaft #35039-70A).
      • Included Components:
        • One (1) OEM Short Tapered Mainshaft (#35040-50)
        • One (1) OEM Main Drive Gear (4th Gear) with internal bushing
        • One (1) OEM Mainshaft Low Gear (1st Gear)
        • One (1) OEM Mainshaft 3rd Gear
        • One (1) Aftermarket mainshaft sprocket seal locking nut upgrade with a rubber oil seal interface.
      • Condition Details: Clean used vintage stock. Gear teeth faces show sharp, functional profiles with excellent factory dog corners and no chips. Splined regions are solid with uniform tracking paths. The assembly is coated in clean storage oil to preserve it against rust or warehouse humidity.

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